usb: dwc3: Add Qualcomm DWC3 glue layer driver (d9152161) · Commits · 戴 / test

drivers/usb/dwc3/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -89,6 +89,14 @@ config USB_DWC3_ST
		inside (i.e. STiH407).
		Say 'Y' or 'M' if you have one such device.

		config USB_DWC3_QCOM
		tristate "Qualcomm Platforms"
		depends on ARCH_QCOM \|\| COMPILE_TEST
		default USB_DWC3
		help
		Recent Qualcomm SoCs ship with one DesignWare Core USB3 IP inside,
		say 'Y' or 'M' if you have one such device.

		comment "Debugging features"

		config USB_DWC3_DEBUG

drivers/usb/dwc3/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -36,4 +36,5 @@ obj-$(CONFIG_USB_DWC3_OMAP) += dwc3-omap.o
		obj-$(CONFIG_USB_DWC3_EXYNOS) += dwc3-exynos.o
		obj-$(CONFIG_USB_DWC3_PCI) += dwc3-pci.o
		obj-$(CONFIG_USB_DWC3_KEYSTONE) += dwc3-keystone.o
		obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o
		obj-$(CONFIG_USB_DWC3_ST) += dwc3-st.o

drivers/usb/dwc3/dwc3-qcom.c

0 → 100644

+131 −0

Original line number	Diff line number	Diff line
		/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		* only version 2 as published by the Free Software Foundation.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*/

		#include <linux/clk.h>
		#include <linux/err.h>
		#include <linux/io.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/of_platform.h>
		#include <linux/platform_device.h>

		struct dwc3_qcom {
		struct device *dev;

		struct clk *core_clk;
		struct clk *iface_clk;
		struct clk *sleep_clk;
		};

		static int dwc3_qcom_probe(struct platform_device *pdev)
		{
		struct device_node *node = pdev->dev.of_node;
		struct dwc3_qcom *qdwc;
		int ret;

		qdwc = devm_kzalloc(&pdev->dev, sizeof(*qdwc), GFP_KERNEL);
		if (!qdwc)
		return -ENOMEM;

		platform_set_drvdata(pdev, qdwc);

		qdwc->dev = &pdev->dev;

		qdwc->core_clk = devm_clk_get(qdwc->dev, "core");
		if (IS_ERR(qdwc->core_clk)) {
		dev_err(qdwc->dev, "failed to get core clock\n");
		return PTR_ERR(qdwc->core_clk);
		}

		qdwc->iface_clk = devm_clk_get(qdwc->dev, "iface");
		if (IS_ERR(qdwc->iface_clk)) {
		dev_dbg(qdwc->dev, "failed to get optional iface clock\n");
		qdwc->iface_clk = NULL;
		}

		qdwc->sleep_clk = devm_clk_get(qdwc->dev, "sleep");
		if (IS_ERR(qdwc->sleep_clk)) {
		dev_dbg(qdwc->dev, "failed to get optional sleep clock\n");
		qdwc->sleep_clk = NULL;
		}

		ret = clk_prepare_enable(qdwc->core_clk);
		if (ret) {
		dev_err(qdwc->dev, "failed to enable core clock\n");
		goto err_core;
		}

		ret = clk_prepare_enable(qdwc->iface_clk);
		if (ret) {
		dev_err(qdwc->dev, "failed to enable optional iface clock\n");
		goto err_iface;
		}

		ret = clk_prepare_enable(qdwc->sleep_clk);
		if (ret) {
		dev_err(qdwc->dev, "failed to enable optional sleep clock\n");
		goto err_sleep;
		}

		ret = of_platform_populate(node, NULL, NULL, qdwc->dev);
		if (ret) {
		dev_err(qdwc->dev, "failed to register core - %d\n", ret);
		goto err_clks;
		}

		return 0;

		err_clks:
		clk_disable_unprepare(qdwc->sleep_clk);
		err_sleep:
		clk_disable_unprepare(qdwc->iface_clk);
		err_iface:
		clk_disable_unprepare(qdwc->core_clk);
		err_core:
		return ret;
		}

		static int dwc3_qcom_remove(struct platform_device *pdev)
		{
		struct dwc3_qcom *qdwc = platform_get_drvdata(pdev);

		of_platform_depopulate(&pdev->dev);

		clk_disable_unprepare(qdwc->sleep_clk);
		clk_disable_unprepare(qdwc->iface_clk);
		clk_disable_unprepare(qdwc->core_clk);

		return 0;
		}

		static const struct of_device_id of_dwc3_match[] = {
		{ .compatible = "qcom,dwc3" },
		{ /* Sentinel */ }
		};
		MODULE_DEVICE_TABLE(of, of_dwc3_match);

		static struct platform_driver dwc3_qcom_driver = {
		.probe = dwc3_qcom_probe,
		.remove = dwc3_qcom_remove,
		.driver = {
		.name = "qcom-dwc3",
		.owner = THIS_MODULE,
		.of_match_table = of_dwc3_match,
		},
		};

		module_platform_driver(dwc3_qcom_driver);

		MODULE_ALIAS("platform:qcom-dwc3");
		MODULE_LICENSE("GPL v2");
		MODULE_DESCRIPTION("DesignWare USB3 QCOM Glue Layer");
		MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");

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